How Much Weight Will I Lose on a 3 Day Water Fast

Written by Kyla Adams


Posted on December 22 2023


Embarking on a 3-day water fast can be a challenging yet potentially rewarding journey for those looking to kickstart their weight loss or reset their body. While the concept of fasting has been practiced for centuries for various reasons, it's crucial to approach it with caution and understanding. In this blog post, we'll explore the potential weight loss associated with a 3-day water fast and what you should consider before undertaking such an endeavour.


Understanding Water Fasting:


Water fasting involves abstaining from all food and drink, except water, for a designated period. Advocates of water fasting suggest that it can promote various health benefits, including autophagy (cellular repair), improved insulin sensitivity, and potential weight loss.


Weight Loss during a 3-Day Water Fast:


The amount of weight lost during a 3-day water fast can vary significantly from person to person. Factors such as individual metabolism, starting weight, and overall health play a crucial role in determining the extent of weight loss. On average, some individuals may experience a loss of 1 to 2 pounds per day during a water fast, primarily due to the depletion of glycogen stores and water weight.


Glycogen Depletion:


In the initial stages of a water fast, the body relies on stored glycogen for energy. Glycogen is a form of glucose stored in the liver and muscles. As the body depletes these glycogen stores, it releases water, contributing to the initial weight loss. However, it's important to note that this weight loss is temporary and not indicative of fat loss.


Fat Loss:


While a 3-day water fast may result in some fat loss, it is generally limited compared to longer-term fasting or sustained dietary changes. The body begins to tap into fat stores for energy after glycogen is depleted. However, the primary focus of a short-term fast is often on metabolic and hormonal benefits rather than significant fat loss.


Potential Considerations:


Before attempting a 3-day water fast or any form of fasting, it's crucial to consider your individual health, consult with a healthcare professional, and understand the potential risks involved. Fasting may not be suitable for everyone, especially those with certain medical conditions or individuals who are pregnant, breastfeeding, or have a history of eating disorders.




While a 3-day water fast may lead to a noticeable drop on the scale, it's essential to approach it with realistic expectations and a focus on overall well-being. Weight loss during a water fast is often a combination of glycogen depletion, water loss, and some fat loss. If weight loss is your primary goal, it's advisable to adopt sustainable and healthy lifestyle changes, such as a balanced diet and regular physical activity, rather than relying on short-term fasting alone. Always consult with a healthcare professional before making significant changes to your diet or lifestyle.